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. 2000 Dec 19;97(26):14421–14426. doi: 10.1073/pnas.97.26.14421

Figure 3.

Figure 3

HPLC/MS chromatograms of tetraether membrane lipids in Carbury peat bog (Ireland) (a) and Mok Bay (NE Netherlands) (b) revealing the abundance of non-isoprenoid GDGTs X and XI in terrestrial and coastal environments. Roman numbers refer to structures in Fig. 1. The inset shows the APCI mass spectrum of GDGT XI.